Exercise cycle



FIG. 1 is a side perspective view of an exercise cycle showing my new design;

FIG. 2 is a side perspective view thereof showing the side opposite that shown in FIG. 1;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a front perspective view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top perspective view thereof. 

The ornamental design for an exercise cycle, as shown. 